Reconstruction of Sound Field Based on Mono-Poles Array Modes

Abstract:

To effectively reduce radiation noise of the structures, the information detailed of the acoustic field is required. An approach of acoustic field reconstruction based mono-poles array modes is developed. The acoustic source is expressed as the form of some mono-poles array superposition which is defined as mono-poles array radiation mode. The amplitudes of these mono-poles are equal and their phase angles are in phase or out of phase in each array form. The amplitudes of mono-poles array modes are obtained by means of the complex pressures measured in near field, and then the whole acoustic field can be reconstructed. Feasibility of this approach is verified through a numerical example of a single-point harmonic excited and simple supported plate and the error analysis shows that the near field reconstruction result is accurate and the far field reconstruction result is more accurate.

• Periodical: Applied Mechanics and Materials (Volumes 226-228)
• Pages: 316-319
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.226-228.316
• Online since: November 2012
• Authors: Yong Fa Nie, Hai Chao Zhu, Rong Fu Mao
• Keywords: Mono-Pole Array Radiation Mode, Mono-Pole Array Sound Field Distribution Mode, Reconstruction of Sound Field

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